Katie Stuart as Cassandra

Episodes 2

7.9

Singularity

1x15
October 31, 1997

A mysterious affliction wipes out the entire population of a planet, plus an SG team -- except for one young girl. Carter befriends her, but learns that she is being used by the Goa'uld.

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July 3, 1998

Carter is possessed by a Goa'uld who claims to be an enemy of the System Lords.

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